Datasheet

Appendix A Electrical Characteristics
MC9S12E128 Data Sheet, Rev. 1.07
Freescale Semiconductor 573
A.2.1 Chip Power-up and LVI/LVR Graphical Explanation
Voltage regulator sub modules LVI (low voltage interrupt), POR (power-on reset) and LVR (low voltage
reset) handle chip power-up or drops of the supply voltage. Their function is described in Figure A-1.
Figure A-1. Voltage Regulator — Chip Power-up and Voltage Drops (not scaled)
A.2.2 Output Loads
A.2.2.1 Resistive Loads
The on-chip voltage regulator is intended to supply the internal logic and oscillator circuits allows no
external DC loads.
A.2.2.2 Capacitive Loads
The capacitive loads are specified in Table A-10. Ceramic capacitors with X7R dielectricum are required.
Table A-10. Voltage Regulator — Capacitive Loads
Num Characteristic Symbol Min Typical Max Unit
1V
DD
external capacitive load C
DDext
200 440 12000 nF
2V
DDPLL
external capacitive load C
DDPLLext
90 220 5000 nF
V
LVID
V
LVIA
V
LVRD
V
LVRA
V
PORD
LVI
POR
LVR
t
V
V
DDA
V
DD
LVI enabled LVI disabled due to LVR